Dosimetric properties of calcium phosphate tablets prepared by spark plasma sintering method
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Considering the importance of having a suitable dosimeter to measure the dose in the range of 10–1000 Gy, the dosimetry response of calcium phosphate, as a thermoluminescent dosimeter, was investigated. In addition to studying the dosimetric response of the samples in powder shapes, the tablet forms of the samples produced by compressing the powders with the spark plasma sintering method at 650 ◦C and 685 ◦C and 40 MPa were also examined. The findings indicate that most samples exhibit a linear response within the desired dose range and have a good response to dose changes. The average glow peak temperature ranged from 195 to 235 ◦C. The weakness of the samples was their fading effects; thus, most samples lost their effectiveness within 30 days. While the results indicate that the synthesized β-TCP calcium phosphate tablets compressed at 650 ◦C and 40 MPa show the best dose response among the samples studied, a comparison between the dosimetric responses of powder and tablet forms reveals that the tablet preparation conditions are crucial, and converting powder into tablets does not necessarily yield improved dosimetric outcomes.
Abstract
Considering the importance of having a suitable dosimeter to measure the dose in the range of 10–1000 Gy, the dosimetry response of calcium phosphate, as a thermoluminescent dosimeter, was investigated. In addition to studying the dosimetric response of the samples in powder shapes, the tablet forms of the samples produced by compressing the powders with the spark plasma sintering method at 650 ◦C and 685 ◦C and 40 MPa were also examined. The findings indicate that most samples exhibit a linear response within the desired dose range and have a good response to dose changes. The average glow peak temperature ranged from 195 to 235 ◦C. The weakness of the samples was their fading effects; thus, most samples lost their effectiveness within 30 days. While the results indicate that the synthesized β-TCP calcium phosphate tablets compressed at 650 ◦C and 40 MPa show the best dose response among the samples studied, a comparison between the dosimetric responses of powder and tablet forms reveals that the tablet preparation conditions are crucial, and converting powder into tablets does not necessarily yield improved dosimetric outcomes.